/Engine/Plugins/Editor/GameplayTagsEditor/Source/GameplayTagsEditor/Public/SGameplayTagPicker.h
Called on when tags might need refreshing (e.g. after undo/redo or when tags change). UseSetTagContainers()to set the new tags.
typedef TBaseDelegate_OneParam< void, [SGameplayTagPicker](API\Plugins\GameplayTagsEditor\SGameplayTagPicker) & > FOnRefreshTagContainers